external/bsd/atf/dist/atf-c/config.c

   1 /*
   2  * Automated Testing Framework (atf)
   3  *
   4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <ctype.h>
  31 #include <stdbool.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 #include "atf-c/config.h"
  36
  37 #include "detail/env.h"
  38 #include "detail/sanity.h"
  39
  40 static bool initialized = false;
  41
  42 static struct var {
  43     const char *name;
  44     const char *default_value;
  45     const char *value;
  46     bool can_be_empty;
  47 } vars[] = {
  48     { "atf_arch",           ATF_ARCH,           NULL, false, },
  49     { "atf_build_cc",       ATF_BUILD_CC,       NULL, false, },
  50     { "atf_build_cflags",   ATF_BUILD_CFLAGS,   NULL, true,  },
  51     { "atf_build_cpp",      ATF_BUILD_CPP,      NULL, false, },
  52     { "atf_build_cppflags", ATF_BUILD_CPPFLAGS, NULL, true,  },
  53     { "atf_build_cxx",      ATF_BUILD_CXX,      NULL, false, },
  54     { "atf_build_cxxflags", ATF_BUILD_CXXFLAGS, NULL, true,  },
  55     { "atf_confdir",        ATF_CONFDIR,        NULL, false, },
  56     { "atf_includedir",     ATF_INCLUDEDIR,     NULL, false, },
  57     { "atf_libdir",         ATF_LIBDIR,         NULL, false, },
  58     { "atf_libexecdir",     ATF_LIBEXECDIR,     NULL, false, },
  59     { "atf_machine",        ATF_MACHINE,        NULL, false, },
  60     { "atf_pkgdatadir",     ATF_PKGDATADIR,     NULL, false, },
  61     { "atf_shell",          ATF_SHELL,          NULL, false, },
  62     { "atf_workdir",        ATF_WORKDIR,        NULL, false, },
  63     { NULL,                 NULL,               NULL, false, },
  64 };
  65
  66 /* Only used for unit testing, so this prototype is private. */
  67 void __atf_config_reinit(void);
  68
  69 /* ---------------------------------------------------------------------
  70  * Auxiliary functions.
  71  * --------------------------------------------------------------------- */
  72
  73 static
  74 char *
  75 string_to_upper(const char *str)
  76 {
  77     char *uc;
  78
  79     uc = (char *)malloc(strlen(str) + 1);
  80     if (uc != NULL) {
  81         char *ucptr = uc;
  82         while (*str != '\0') {
  83             *ucptr = toupper((int)*str);
  84
  85             str++;
  86             ucptr++;
  87         }
  88         *ucptr = '\0';
  89     }
  90
  91     return uc;
  92 }
  93
  94 static
  95 void
  96 initialize_var(struct var *var, const char *envname)
  97 {
  98     PRE(var->value == NULL);
  99
 100     if (atf_env_has(envname)) {
 101         const char *val = atf_env_get(envname);
 102         if (strlen(val) > 0 || var->can_be_empty)
 103             var->value = val;
 104         else
 105             var->value = var->default_value;
 106     } else
 107         var->value = var->default_value;
 108
 109     POST(var->value != NULL);
 110 }
 111
 112 static
 113 void
 114 initialize(void)
 115 {
 116     struct var *var;
 117
 118     PRE(!initialized);
 119
 120     for (var = vars; var->name != NULL; var++) {
 121         char *envname;
 122
 123         envname = string_to_upper(var->name);
 124         initialize_var(var, envname);
 125         free(envname);
 126     }
 127
 128     initialized = true;
 129 }
 130
 131 /* ---------------------------------------------------------------------
 132  * Free functions.
 133  * --------------------------------------------------------------------- */
 134
 135 const char *
 136 atf_config_get(const char *name)
 137 {
 138     const struct var *var;
 139     const char *value;
 140
 141     if (!initialized) {
 142         initialize();
 143         INV(initialized);
 144     }
 145
 146     value = NULL;
 147     for (var = vars; value == NULL && var->name != NULL; var++)
 148         if (strcmp(var->name, name) == 0)
 149             value = var->value;
 150     INV(value != NULL);
 151
 152     return value;
 153 }
 154
 155 void
 156 __atf_config_reinit(void)
 157 {
 158     struct var *var;
 159
 160     initialized = false;
 161
 162     for (var = vars; var->name != NULL; var++)
 163         var->value = NULL;
 164 }